2. Sample Papers
  3. 7th Class
  4. Science

7th Class Science Sample Paper Science Olympiad Model Test Paper-5

  • question_answer
    The organic impurities present in sewage are:

    A) Animal waste

    B) Urea

    C) Fruits and vegetable wastes

    D) All of these

    E) None of these

    Correct Answer: D

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